overall: 23.3 cm x 55 cm x 37.7 cm; 9 3/16 in x 21 21/32 in x 14 27/32 in
Object Name:
route indicator
drift indicator
drift sight
Place made:
Italy
Description:
This metal instrument was used for indicating the path of airplanes. It has a metal frame, several interconnected scales, and two bubble levels. The instrument and several parts are in a wooden case. The Italian mathematician and aeronautical engineer Gaetano Arturo Crocco (1877-1968) invented it in the device in 1919.